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Fertilization

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...

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Related Experiment Video

Updated: Aug 8, 2025

In Vivo Visualization of Calcium Transients during Fertilization and Early Development in C. elegans

In Vivo Visualization of Calcium Transients during Fertilization and Early Development in C. elegans

Published on: July 12, 2024

Fertilization: what we can learn from worms.

Katherine Maniates¹, Andrew Singson¹

¹Rutgers, The State University of New Jersey, United States.

|March 6, 2023

Summary

This summary is machine-generated.

The nematode worm Caenorhabditis elegans is a powerful model for discovering genes involved in fertilization. Research in worms has revealed genetic mechanisms for sperm-egg union, with implications for human infertility and contraception.

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Last Updated: Aug 8, 2025

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Measuring Sperm Guidance and Motility within the Caenorhabditis elegans Hermaphrodite Reproductive Tract

Measuring Sperm Guidance and Motility within the Caenorhabditis elegans Hermaphrodite Reproductive Tract

Published on: June 6, 2019

Area of Science:

Genetics
Developmental Biology
Reproductive Science

Background:

Infertility and contraception are significant societal issues with largely unknown genetic underpinnings.
The nematode worm Caenorhabditis elegans (C. elegans) has been established as a powerful genetic model system.
Significant genetic tools and community research efforts exist for studying C. elegans.

Purpose of the Study:

To explore the genetic mechanisms of fertilization using C. elegans.
To highlight the discoveries made in understanding the sperm-egg interaction in worms.
To provide an overview of current knowledge and future research directions.

Main Methods:

Utilizing Caenorhabditis elegans as a genetic model organism.
Employing mutagenesis to discover genes involved in biological pathways.
Leveraging established genetic tools within the C. elegans research community.

Main Results:

Identification of genes essential for uniting sperm and egg in C. elegans.
Detailed understanding of the molecular mechanisms at the fertilization synapse.
Discovery of genes in worms homologous to those in mammals, with similar mutant phenotypes.

Conclusions:

C. elegans is a valuable model for uncovering fundamental fertilization genes.
Worm research provides insights into conserved mechanisms relevant to mammalian reproduction.
Future research in C. elegans will continue to advance understanding of fertility and contraception.